88 lines
2.8 KiB
Java
88 lines
2.8 KiB
Java
/*
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* Copyright 2016 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.swt;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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/**
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* Utility methods for SWT. SWT is always available for compiling, so it is not necessary to use reflection to compile it.
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* <p>
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* SWT system tray types are GtkStatusIcon trays (so we don't want to use them)
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*/
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public
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class Swt {
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public final static boolean isLoaded;
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public final static boolean isGtk3;
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private static final int version;
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// NOTE: This class cannot have SWT **ANYTHING** in it
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static {
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// There is a silly amount of redirection, simply because we have to be able to access SWT, but only if it's in use.
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// Since this class is the place other code interacts with, we can use SWT stuff if necessary without loading/linking
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// the SWT classes by accident
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Class<?> swtErrorClass = AccessController.doPrivileged(new PrivilegedAction<Class<?>>() {
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@Override
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public
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Class<?> run() {
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try {
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return Class.forName("org.eclipse.swt.SWTError", true, ClassLoader.getSystemClassLoader());
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} catch (Exception ignored) {
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}
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try {
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return Class.forName("org.eclipse.swt.SWTError", true, Thread.currentThread().getContextClassLoader());
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} catch (Exception ignored) {
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}
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return null;
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}
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});
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if (swtErrorClass != null && SwtAccess.isLoadable()) {
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// this means that SWT is available in the system at runtime. We use the error class because that DOES NOT initialize anything
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version = SwtAccess.getVersion();
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isLoaded = true;
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isGtk3 = SwtAccess.isGtk3();
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SwtAccess.init();
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} else {
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version = 0;
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isLoaded = false;
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isGtk3 = false;
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}
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}
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public static
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int getVersion() {
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return version;
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}
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public static
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void dispatch(final Runnable runnable) {
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SwtAccess.dispatch(runnable);
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}
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public static
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boolean isEventThread() {
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return SwtAccess.isEventThread();
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}
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public static
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void onShutdown(final Runnable runnable) {
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SwtAccess.onShutdown(runnable);
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}
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}
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